This is often one that is often overlooked from a business perspective. So much time and effort can be put into defending the network perimeter that the threat from inside the business is often forgotten and it is the most dangerous threat there is.
It could be change in behaviour, access to things that the user doesn’t need access to and many more opportunities to exploit the weaknesses of the business with regards to its information.
The major insider threat comes from managers or others with privileged access to sensitive data (commercial or personal), third parties, contractors or others that have access to your information system and finally other employees that either maliciously or accidently facilitate an attack or loss of data.
Watch this short video to get an insight into this very real threat.